Nancy Friedrich

Microwaves & RF

Nancy Friedrich began her career in technical publishing in 1998. After a stint with sister publication Electronic Design as Chief Copy Editor, Nancy worked as Managing Editor of Embedded Systems Development. She then became a Technology Editor at Wireless Systems Design, an offshoot of Microwaves & RF. Nancy has called the microwave space “home” since 2005.

Active Cable-Mesh Main Reflector Proves Feasible
Following the completion of the Atacama large-millimeter/submillimeter array (ALMA), an initiative emerged to develop a radio telescope that would provide a two-orders-of-magnitude increment in sensitivity over existing facilities at ...
All-Capacitor Pi Matching Network Utilizes Series Element's ESL
At lease two reactive elements are needed to match a lossless network to an arbitrary load. Yet two elements alone will not provide simultaneous control over the bandwidth and degree of match. Three-element matching networks, such as Pi- and ...
X-Band GaN HEMT Boasts 50 W Output Power
Many RF manufacturers are turning to galliumnitride (GaN) for its promise of higher power. GaN high-electron-mobility-transistor (HEMT) amplifiers, for example, may be capable of attaining significantly higher gain and output power than GaAs ...
WiMAX Circulators Manage 0.20 dB Insertion Loss
WIMAX is on the rise with networks set to deploy in cities across the globe. To support this buildup, a family of single-junction surface-mount circulators is well suited for various WiMAX applications. The MAFR-000229000001, MAFR-000050-5S4C1T, ...
VNA Options Enhance Amplifier Measurements
Characterizing a high-frequency amplifier can be rather tricky. In fact, just configuring a network analyzer for the right set of measurements can be challenging. To ease this process, Rohde & Schwarz (Hants, United Kingdom) offers a 17page-long ...
Hawaii Gets A Thumbs Up After All
Rather than being a black mark on MTT-S, the Honolulu location might have actually been a blessing.
Vector And Spectrum Analyzers Merge
To perform their jobs, RF engineers often rely on both spectrum analyzers and vector network analyzers (VNAs). To make it easier for designers to leverage these instruments, the ZVL series merges a full-featured VNA with a spectrum analyzer in ...
RF Immunity Testing Helps To Maintain Quality Performance
Unwanted signals are proliferating in part because of the popularity of GSM cell phones. Such RF signals can disrupt the operation of electronic circuits without adequate RF noise-rejection capabilities. To guarantee the satisfactory operation ...
Portable Handheld Analyzers Span 2 To 1600 MHz
Interoperability continues to be a problem for homeland-security, public-safety, and other agencies. To assuage this problem, the S311D/S312D Site Master cable and antenna analyzers combine a frequency of 2 to 1600 MHz in a portable, rugged ...
Microstrip Patch Antenna Populates CPW Stub With MEMS Capacitors
Using radio-frequency microelectromechanical-systems (MEMS) technology, a tunable frequency microstrip patch antenna has been developed. It consists of a patch antenna loaded with a coplanar-waveguide (CPW) loading section, which is attached to ...
Software Eases Design Pain At Various Stages
Although simulation remains essential, many software platforms offer an increasing number of capabilities for specific RF design problems and challenges.
Microwaves Determine Pregnancy Through Urine Analysis
Shortly after conception, the human chorionic gonadotropin (hCG) glycoprotein hormone is secreted by the developing placenta. During early gestational growth, hCG rises in concentration. As a result, hCH is an excellent marker for the early ...
UWB LNA Achieves Maximum Gain Of 13.5 dB From 1.85 To 10.2 GHz
Many researchers are evaluating Ultra Wideband's (UWB's) applicability for short-range, high-speed wireless communications. Yet these systems must first overcome a challenging building block: the low-noise amplifier (LNA). A UWB LNA was recently ...
Double-Balanced Wideband Mixers Cover 0.7 To 10 GHz
To satisfy GPS, telecommunication, radar, EW, and instrumentation applications, a family of wideband, double-balanced mixers has emerged. The monolithic-microwave integrated circuits (MMICs) cover the 0.7-to-10-GHz band. The CGY2180UH, CGY2181UH, and ...
MIMO System Achieves 108-Mb/s Data Rate Using 16-MHz Channel
Higher data rates can be achieved by using wider RF bandwidths. Yet those bandwidths reduce the number of users that can simultaneously be connected to the network. A number of technologies have emerged to resolve this issue. Recently, a fully integrated ...

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Reducing Life Cycle Costs with Reliable Airframe Microwave Assemblies
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Power Integrity Measurements – Choosing the Right Tools
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USB 3.1 - Gen2 10Gbps Receiver Test Challenges
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